Kig
Kig: A free desktop tool for exploring constructions, with macros and drawing features. Ranked #3 of 34 in Geometry Learning Software by our editors (7.7/10); pricing: Free plan; best for established users of desktop construction tools.
At a glance
- Editor score7.7 / 10
- PricingFree plan
- Best forEstablished users of desktop construction tools
- Free planYes
- Paid fromNone
- Dynamic constructionsYes
- Facts checked28 Sep 2026
Where it wins
- Explore constructions built from points, vectors, lines, and polygons
- Modify construction elements directly with the mouse
- Create loci and extend functionality with Python-written macros
Where it doesn't
- Desktop application for Linux and macOS, not an online classroom service
- No proof practice or problem practice features
- No classroom tools
Our verdict on Kig
Kig is interactive geometry software for students and teachers who want to create and explore geometric figures on a desktop. It supports constructions from points, vectors, lines, and polygons, with direct mouse editing so users can investigate how a figure changes. It also draws mathematical figures for inclusion in other documents. Its fit is strongest for established users of desktop construction tools who value interactive exploration over a broader classroom or practice suite.
The construction workflow covers more than static drawing: users can construct objects using other objects as arguments and build loci. Imported macros extend the application, and macros can be written with Python. Those capabilities make Kig useful for users who want to repeat or expand construction work, while keeping the focus on geometry rather than guided exercises. It is a downloadable desktop application, not an online classroom service, and it does not include proof or problem practice features. Learners seeking structured practice or classroom tools should consider a broader geometry suite instead.
Kig is open-source software distributed under GPL-2.0-or-later, and the published distribution is free. KDE provides Linux installation information and links to macOS builds. The supported desktop platforms make it a fit for solo users and small groups working in those environments, rather than teams seeking a browser-based shared workspace. Community, email, and documentation are listed support channels. Choose Kig for interactive constructions, loci, and document-ready figures; look elsewhere if online collaboration, classroom management, proofs, or practice problems are central requirements.
Kig pricing
Kig fact sheet
| Free plan | Yes |
|---|---|
| Paid from | None |
| Dynamic constructions | Yes |
| Proof practice | No |
| Problem practice | No |
| Classroom tools | No |
| Supported platforms | Desktop |
| Offline mode | Not verified |
| Deployment | Desktop |
| Platforms | Linux, macOS |
| Support | Community, Email, Docs |
| Built for | Solo, Small business (editorial estimate) |
| Pricing | Free plan |
| Website | apps.kde.org |
| Facts checked | 28 Sep 2026 |
Alternatives to Kig
- GeoGebraA broad geometry and mathematics suite with adaptive practice, classroom tools, and offline apps.9.0
- GNU Dr. GeoA free, programmable desktop geometry environment for dynamic constructions and exploration.8.2
- CabriA versatile geometry suite for dynamic 2D and 3D learning across school levels.7.6
Kig vs the competition
- Kig vs GeoGebra
- Kig vs GNU Dr. Geo
- Kig vs Cabri
- Kig vs COSMIQ Geometry Practice
- Kig vs The Geometer's Sketchpad
- Kig vs Cinderella
Compare Kig with any tool side by side →
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Reviewed by iTechGuides Editors · Editorial team · Updated Sep 2026
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